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Swartkrans is a fossil-bearing cave designated as a South African National Heritage Site, located about 32 km (20 mi) from Johannesburg.[1] It is located in the Cradle of Humankind World Heritage Site and is notable for being extremely rich in archaeological material, particularly hominin remains.[2] Fossils discovered in the limestone of Swartkrans include Telanthropus capensis (a variety of Homo erectus), Paranthropus and Homo habilis. S. V. Drobyshevskiy identifies remains of Homo naledi with Telanthropus.[3] The oldest deposits present at the site are believed to be between 1.9 and 2.1 million years old.[4]

Swartkrans
UNESCO World Heritage Site
Official name Swartkrans and Fossil Hominid Sites of South Africa
Location Gauteng, South Africa Edit this at Wikidata
Coordinates 25°55′45″S 27°47′20″E / 25.92917°S 27.78889°E / -25.92917; 27.78889Coordinates: 25°55′45″S 27°47′20″E / 25.92917°S 27.78889°E / -25.92917; 27.78889
Criteria Cultural: (iii)(vi)
Reference 915
Inscription 1999 (23rd Session)
Extensions 2005
Swartkrans is located in Gauteng
Swartkrans
Location of Swartkrans
Swartkrans is located in South Africa
Swartkrans
Location of Swartkrans

Noted paleontologist Robert Broom was a frequent digger. He was followed by C. K. 'Bob' Brain, whose excavations at the site inspired his book The Hunters or the Hunted? in which he demonstrated that instead of being bloodthirsty killer apes, the hominin fossils found at the site were themselves victims of predation by big cats.[5] Originally, it was believed that Dinofelis was responsible for such killings, though recent evidence suggests that hominids were likely the victims of Megantereon or leopards based on carbon isotope ratios taken from each predator.[6]

Contents

History of investigationsEdit

Swartkrans is located on the Blaauwbank River in the Cradle of Humankind, which has a long record of some of the oldest hominin remain descoveries in the world. It is located 1 kilometre (0.62 mi) from Sterkfontein, a site that has yielded similar discoveries of the same era.[2] The private farmland the cave was originally on was purchased by the University of the Witwatersrand in 1968.[citation needed]

The cave was discovered in 1948, and initial excavations were carried out by paleontologist Robert Broom. His team uncovered several remains of Paranthropus robustus and early Homo species. It was the first site at which both Paranthropus and Homo had been found together, indicating that they were contemporary.[4]

Excavation then halted until the mid-1960s and continued until the 1980s, when C. K. Brain brought a team to Swartkrans. Thousands of artifacts and faunal remains were uncovered, 415 of which are considered to be hominin. Brain expanded upon the site's stratigraphy, which was more complex than previously thought.[4]

DiscoveriesEdit

Some of the earliest evidence of controlled use of fire by humans can be found at Swartkrans, up to 1.5 million years ago.[7][8]

Some of the earliest evidence of modified bone tools has been found at Swartkrans and Sterkfontein, with the oldest at Swartkrans dating to about 1.8 million years ago. These tools may have been made by Australopithecus robustus or an early species of Homo, which both inhabited the cave around the same time.[9]

These early tools were first speculated to have been used to dig up tubers, but they may instead have been used to harvest termites, which were present during Swartkrans's occupation; many of these tools may have been multipurpose. Re-evaluation of wear on stone and bone tools uncovered by Brain in earlier excavations and experiments by researchers have led to the conclusion that termites, a high source of nutrients, were a supplementary food source for early hominids. Bone tools would have allowed for easier extraction of the insects than stones would have.[2][9]

In 2016, the discovery of the earliest known evidence of cancer in hominins was announced. An osteosarcoma was found on a partial left fifth metatarsal from an unclassified hominin.[4]

GeologyEdit

Swartkrans is a limestone cave and has been divided geologically into five members. Member 1 consists of two large masses, named the Hanging Remnant and Lower Bank. Homo ergaster and Paranthropus robustus remains have been found in Member 1, and Member 2 has yielded the same genera.[4]

ReferencesEdit

  1. ^ "9/2/233/0012 - Swartkrans Palaeontological Site, Zwartkrans 172, Krugersdorp District". South African Heritage Resources Agency. Retrieved 16 September 2013. 
  2. ^ a b c Lesnik, J.; Thackeray, J. F. (1 September 2007). "The efficiency of stone and bone tools for opening termite mounds: implications for hominid tool use at Swartkrans". South African Journal of Science. 103 (9/10): 354–356. 
  3. ^ Drobyshevskii, S. (1 August 2016). "Вспоминая телантропов: крах "теории Homo naledi"?" (in Russian). Retrieved 15 July 2017. 
  4. ^ a b c d e Odes, Edward J.; Randolph-Quinney, Patrick S.; Steyn, Maryna; Throckmorton, Zach; Smilg, Jacqueline S.; Zipfel, Bernhard; Augustine, Tanya N.; de Beer, Frikkie; Hoffman, Jakobus W. (1 July 2016). "Earliest hominin cancer: 1.7-million-year-old osteosarcoma from Swartkrans Cave, South Africa". South African Journal of Science. 112 (7/8). doi:10.17159/sajs.2016/20150471. 
  5. ^ Brain, C. K. (1981). The Hunters or the Hunted?: An Introduction to African Cave Taphonomy. Chicago: University of Chicago Press. ISBN 9780226070902. 
  6. ^ Piegl, Linda; Bothma, Bianca (20 December 2011). "Dinofelis – Hominid Hunter or Misunderstood Feline?". Maropeng. Maropeng – Official Visitor Centre. Retrieved 15 July 2017. 
  7. ^ C. K. Brain; A. Sillent (12 January 1988). "Evidence from the Swartkrans cave for the earliest use of fire". Nature. 336 (6198): 464–466. doi:10.1038/336464a0. Retrieved 14 June 2011. 
  8. ^ Rincon, Paul (22 March 2004). "Bones hint at first use of fire". BBC. Retrieved 14 June 2011. 
  9. ^ a b Backwell, Lucinda R.; d'Errico, Francesco (13 February 2001). "Evidence of termite foraging by Swartkrans early hominids" (PDF). PNAS. 98 (4): 1358–1363. doi:10.1073/pnas.021551598. Retrieved 15 July 2017. 

External linksEdit